Propynylamine-substituted dibenzo{8 b,f{9 thiepins and dibenz{8 b,f{9 oxepins

ABSTRACT

Compounds of the formulas   OR   WHEREIN R1, R2, R3, R4, R5, R6, R7, R8 and X are as hereinafter set forth, ARE DESCRIBED. The compounds of formulas I and Ia are useful as neuroleptic agents.

United States Patent [191 Dec. 23, 1975 Kaplan et a1.

[ PROPYNYLAMINE-SUBS'ITI'UTED D1BEN7D[B,F]'1'H[EPINS AND [57] ABSTRACT D1BENZ[B,F]OXEPINS Compounds of the formulas [75] Inventors: Jean-Pierre Le-Plessis-Robinsorl, France; Emilio Kyburz, Reinach, Switzerland Filed: Aug. 26, 1974 Appl. No.: 500,770

Related US. Application Data Continuation-impart of Ser. No. 380,653, July 12, 1973, abandoned.

Foreign Application Priority Data June 8, I973 Switzerland 8354/73 May 10, 1974 Switzerland 6421/74 Assignee:

US. Cl.... 260/327 B; 260/243 8; 260/247.1 P; 260/247.l5; 260/268 TR; 260/293.58; 260/326.8l; 260/333; 424/246; 424/248; 424/250; 424/267; 424/274; 424/275; 424/278 Int. Cl. C07D 337/14 field 260/327 B, 333, 268 TR, 260/3268], 293.58, 247.1 P, 247.1 S, 243 B References Cited UNITED STATES PATENTS 8/1963 Zirkle 260/268 2/1972 Schindler et a1 260/333 1/1974 Gostcli 260/327 B Primary Exanu'ner-Henry R. Jiles Assirtant Examiner-C. M. S. Jaisle Attorney, Agent, or Firm-Samuel L. Welt; Bernard S. Leon; William G. Isgro wherein h R2! R51 R4! R5! R01 R1! R6 and x are as hereinafier set forth, are described. The compounds of formulas 1 and la are useful as neuroleptic agents.

20 Claims, No Drawings PROPYNYLAMINE-SUBSTITUTED DlBENZO[B,F]Tl-IIEPINS AND DIBENZ[B,F]OXEPINS CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation-in-part of U.S. 1

Patent application Ser. No. 380,653, filed July 12, I973, now abandoned.

BRIEF SUMMARY OF THE INVENTION The invention relates to compounds of the formulas R4 R R It R CEC-CH N\ R V; l

R CEC-CH "N la R8 X wherein X is oxygen or sulfur; R and R independently, are hydrogen or lower alkyl; R is hydrogen; R and R independently, are hydrogen, lower alkyl, hydroxy-lower alkyl, alkanoyloxy-lower alkyl or, when taken together, are a saturated S-or 6- membered heterocyclic ring, which may contain an oxygen, a sulfur or an additional nitrogen atom, and which may be substituted by lower alkyl, hydroxy-lower alkyl or alkanoyIoxy-lower alkyl; R is lower alkyl, lower alkyl-sulfonyl, hydroxy, lower alkoxy, lower alkylthio, di-(lower alkyI)-sulfamoyl, halogen, trifluoromethyl, nitro, amino or di-(Iower alkyl)amino; and R and R independently, are hydrogen, lower alkyl, lower alkoxy, lower alkylsulfonyl, hydroxy, lower alkylthio, di-(lower alkyl)- sulfamoyl, halogen, tri-fluoromethyl, nitro, amino or di-(lower alkyl)-amin0, and the corresponding N-oxides and the pharmaceutically acceptable acid addition salts thereof.

DETAILED DESCRIPTION OF THE INVENTION The invention relates to compounds of the formulas R R R)R /CC-CH N X I e and R R1 C=C-CH2-N\ X 8 Ia wherein X is oxygen or sulfur; R and R independently, are hydrogen or lower alkyl; R is hydrogen; R and R independently, are hydrogen, lower alkyl, hydroxy-lower alkyl, alkanoyloxy-lower alkyl or, when taken together, are a saturated 5- or 6- membered heterocyclic ring, which may contain an oxygen, a sulfur or an additional nitrogen atom, and which may be substituted by lower alkyl, hydroxy-lower alkyl or alkanoyloxy-lower alkyl; R is lower alkyl, lower alkyl-sulfonyl, hydroxy, lower alkoxy, lower alkylthio, di-(lower alkyl)-sulfamoyl, halogen, trifluoromethyl, nitro, amino or di-(lower aIkyU-amino; and R and R independently, are hydrogen, lower alkyl, lower alkoxy, lower alkylsulfonyl, hydroxy, lower alkylthio, di-(lower alkyl)- sulfamoyl, halogen, trifluoromethyl, nitro, amino or di-(lower alkyl)-amino, and the corresponding N-oxides and the pharmaceutically acceptable acid addition salts thereof.

As used herein, the term lower alkyl"denotes a straight chain or branched chain hydrocarbon of 1-7 carbon atoms, for example, methyl, ethyl, propyl, butyl, and the like. The term lower alkoxy denotes a lower alkyl ether group in which the lower alkyl moiety is as defined above, for example, methoxy, ethoxy, propoxy, butoxy, and the like. The term lower alkylthio" denotes a lower alkylthio ether group in which the lower alkyl moiety is as defined above, for example, methylthio, ethylthio, propylthio, butylthio, and the like. The term alkanoyloxy" denotes a straight or branched chain lower alkanoyloxy group of 2-8 carbon atoms, preferably of 2-10 carbon atoms, for example, acetoxy, pivaloyloxy, pentanoyloxy, hexanoyloxy, heptanoyloxy, octanoyloxy, nonanoyloxy, decanoyloxy, tetradecanoyloxy, hexadecanoyloxy, octadecanoyloxy, and the like. The S- or 6-membered heterocyclic rings which may contain two nitrogen atoms, or one nitrogen atom, or one nitrogen atom and an oxygen or sulfur atom are exemplified by pyrrolidino, piperazino, piperidino, morpholino, thiomorpholino, methylpiperidino, and the like. The lower alkyl, hydroxy-lower alkyl, or alkanoyloxy-lower alkyl which may be substituted on the heterocyclic moiety is preferably connected to the 3 second nitrogen of the piperazine moiety; exemplary of such are N-methylpiperazino, Nhydroxyethy]- piperazino, N-hydroxypropylpiperazino, N-heptanoyloxypropylpiperazino. All the halogens are included, i.e., fluoro, chloro, bromo and iodo. Chloro is preferred.

It has been discovered that the compounds of formulas l and la of te invention, their N-oxides and pharma ceutically acceptable salts thereof, demonstrate strong neuroleptic activity. They can, therefore, be utilized for the treatment of, for example, acute or chronic schizophrenia, as well as tranquilizers. Advantageously, the compounds of the invention demonstrate no or only very weak cataleptic side effects, so that no or only insignificant motor disturbances are observed. The compounds of formula la are preferred. Preferred compounds of formulas I and In of the invention are those wherein R is hydrogen.

A preferred subgenus also comprises the compounds of formulas I and la wherein X is sulfur. Yet another preferred group of the compounds of the invention are those of formulas I and Ia wherein R and R are lower alkyl, especially methyl.

Still another preferred subgenus comprises the compounds of formulas l and la of the invention, wherein R is methylthio or chloro and R and R are hydrogen. Yet again, those derivatives wherein R is chloro, R, is hydrogen and R is methoxy are also preferred. An especially preferred group of the compounds of formula la of the invention comprises those wherein R is hydrogen, R is hydrogen or lower alkyl, R is lower alkyl, hydroxy-(lower alkyl) or alkanoyloxy-(lower alkyl), or R, and R taken together with the nitrogen atom to which they are attached are a saturated 5- membered or 6-membered heterocyclic ring which may contain oxygen or an additional nitrogen and which may be substituted by hydroxy-(lower alkyl) or alkanoyloxy-(lower alkyl), R is halo or lower alkyl, lower alkoxy, lower alkylthio, lower alkylsulfonyl, di- (lower alkyl)-sulfamoyl, trifluoromethyl, nitro, amino or di-(lower alkyl)-amino, and one of R and R is hydrogen and the other is halo, lower alkyl or lower alkoxy. Preferred within this last-mentioned group of compounds are those wherein R, is hydrogen, R is hydrogen, methyl or ethyl, R is methyl, ethyl, hydroxyethyl or acetoxyethyl or R and R taken together with the nitrogen atom to which they are attached are piperidino, pyrrolidino, morpholino, N-hydroxyethylpiperazino or N-acetoxyethylpiperazino, R is chloro, methyl, methoxy, methylthio, methylsulfonyl, dimethylsulfamoyl, trifluoromethyl, nitro, amino or dimethylamino, l t is hydrogen, chloro or methyl and R is hydrogen, methyl or methoxy. Particularly preferred compounds of the invention are N,N-dimethyl-3-[8- (methylthio)-dibenzo[b,f]thiepin-l-yl]-2-propynyla mine, N,N-dimethyl-3-(8-chlorodibenzo[b,f]thiepinlO-yl )-2 propynylamine and N ,N-dimethyl-3-( 8 chloro-3-methoxy-dibenzo [b,f]thiepinl O-yl )-2- propynylamine, or the pharmaceutically acceptable addition salts thereof.

The tricyclic compounds of formulas I and la as well as their N-oxides and pharmaceutically acceptable salts thereof, can be prepared through processes as hereinafter described:

a. A compound of the formula l0 and R C CH R 1 R R X Ila wherein R R R R R-,, R and X are as hereinbefore described, except that a hydroxy group can also be protected, respectively, is reacted with formaldehyde and a compound of the formula /R4 HN Ill wherein R, and R:, are as hereinbefore described,

b. A compound of the formula R R R R C=CCII -Y 7 R and R CE CCH -Y R 7 I R6 R X Na wherein R R R R R R and X are as hereinbe- 5 fore described, and Y is a leaving group, except that a hydroxy group can also be protected, respectively, is reacted with a compound of the formula HN III wherein R and R are as hereinbefore described,

c. For the preparation of a compound of formula la,a compound of the formula R on CEC-CH -N X v s wherein R,, R,, R R R,, R, and X are as hereinbefore described, except that a hydroxy group can also be protected, is dehydrated, or

d. For the preparation of a compound of formula I or la, wherein R, is hydrogen or lower alkyl and R is lower alkyl, a compound of the formula R R R C C-CH -NHR' and ' R8 VIa wherein R, R R;,, R,, R R and X are as hereinbefore described, and R, is hydrogen or lower alkyl, except that a hydroxy group can also be protected, respectively, is alkylated, or

e. For the preparation of N-oxide of a compound of formula I or la wherein R, and R is other than hydrogen, a compound of the formula R R R CEc-CH VII and

wherein R,, R R R,, R-,, R, and X are as hereinbefore described; R", and R", are lower alkyl, hydroxy- (lower alkyl or alkanoyloxy-( lower alkyl), or R", and R",, taken together with the nitrogen atom, are a saturated S-membered or 6-membered heterocyclic ring which may contain oxygen, sulfur or an additional nitrogen and which may be substituted by lower alkyl, hydroxy-(lower alkyl)-, or alkanoyloxy-(lower alkyl)-, respectively, is oxidized; or

f. For the preparation of a compound of formula I or In wherein R, is hydrogen and R is alkanoyloxy-(lower alkyl), a compound of the formula wherein R R R R R R, and X are as hereinbefore described, R is hydroxy-(lower alkyl)- except that any hydroxy group defined by R R and R, can also be protected, is reacted with an alkanoylating agent, or

g. Convert a base of formula I or [a or an N oxide thereof into the corresponding pharmaceutically acceptable acid addition salt.

The compounds of formulas ll, lla, lV, lVa, V, Va, Vl, Vla, Vll, Vlla, VII] and Villa are novel and also within the scope of the invention.

The following description will further illustrate the processes for the preparation of te tricyclic compounds of the invention, as well as their salts and respectively, their pharmaceutically acceptable acid addition salts.

The starting materials of formula [la can be prepared by the reaction of the corresponding lO-ketones wit an acetylene/metal organic compound, for example, lithium acetylide, an acetylene-magnesium halide or trimethylsilylethynyl lithium. The lithium acetylide is preferably reacted in liquid ammonia and/or an organic solvent, for example, tetrahydrofuran or benzene, or as a complex with ethylene diamine in an inert organic solvent, such as dioxane, tetrahydrofuran or benzene at a temperature between about l0C. and the boiling point of the reaction mixture. The acetylene/magnesium halide and the trimethylsilylethynyl lithium are preferably reacted in an organic solvent suc as tetrahydrofuran or benzene, at a temperature between about --l0C. and the boiling point of the reaction mixture The resulting addition product is subsequently hydrolyzed, for example, by reacting with aqueous ammonium chloride solution at room temperature. The resulting lO-ethynyl-lO-carbinol or, when trimethylsilylethynyl lithium is used, the resulting lO-trimethylsilylethynyl-lO-carbinol, is subsequently dehydrated for example, by heating with a strong acid such as p-toluenesulfonic acid in an organic solvent such as methylene chloride, carbon tetrachloride, acetonitrile, benzene, 0-, m-, or p-xylene, whereby there is obtained the compound of formula Ila or; when trimethylsilylethynyl lithium is used, the corresponding IO-trimethylsilylethynyl compounds. These latter compounds are subjected to a metal-catalyzed hydrolysis by, for example, treatment in aqueous acetone or in aqueous ethanol with silver nitrate and potassium cyanide. The trimethylsilyl group is cleaved under these conditions, even at room temperature, and there is obtained a starting material of formula Ila.

The compounds of formula ll can be prepared, for example, by the reaction of the corresponding tricyclic lO-halo compound, for examle, the chloro compound, with an acetylene/metallic organic compound as described above. The reaction, preferably is carried out in an inert organic solvent such as, for example, ether, benzene or tetrahydrofuran, at a temperature between about lC. and the boiling point of the reaction mixture.

The preparation of the compounds of the invention from the starting materials of formulas ll and lla by reaction with formaldehyde and a compound of formula ill in accordance with embodiment (a) is carried out in accordance with a Mannich reaction. Preferably, it is carried out in the presence of an inert organic solvent, for example, in the presence ofa lower alkanol such as methanol or ethanol, a cyclic ether, for example, dioxane, or a lower alkanecarboxylic acid such as acetic acid; alternatively, in admixture with water. The temperature of the reaction is in the range of from about 0 to 100. The reaction is preferably catalyzed by metal salts, especially copper (ll) salts such as copper (ll) acetate.

The symbol Y of the starting materials of formula IV or lVa preferably is halogen or alkyl-substituted or aryl-substituted sulfonyloxy. Preferably, the substitutent on the sulfonyl moiety is alkyl or aryl such as lower alkyl, especially methyl or phenyl or p-tolyl. Y as halogen is preferably chloro or bromo.

The l0,ll-unsaturated compounds of formula lVa can be prepared, for example, by reacting the corresponding tricyclic lO-ketones, which are known compounds or can be prepared according to known procedures, with a metallo organic compound of 2-propynyl- Z-tetrahydropyranyl ether, for example, with the corresponding lithium or magnesium halide compound. The metallo organic compound of 2-propynyl-2-tetrahydropyranyl ether carries the corresponding metal radical, for example, lithium or magnesium halide radical on the carbon in the 3-position of the Z-propynyl moiety. The lithium compound is preferably reacted in liquid ammonia and/or an organic solvent, such as, for example, tetrahydrofuran, the magnesium halide compound is reacted in an organic solvent such as tetrahydrofuran, at a temperature between about l0C and the boiling point of the reaction mixture. The resulting addition compound is subsequently subjected to hydrolysis, for example, by treatment with aqueous ammonium chloride at room temperature, and the resulting tricyclic l0-[3-(2-tetrahydropyranyloxy)-l-propynyl1- l0-carbinol is subjected to dehydration/hydrolysis, for example, by treatment with a strong acid such as p-toluenesulfonic acid, in methylene chloride, benzene or 0-, mor p-xylene at the boiling temperature of the reaction mixture, and subsequently, boiling with p-toluenesulfonic acid in aqueous ethanol, the dehydration product being thus hydrolyzed. The resulting 10,! lunsaturated, tricyclic lO-(3-hydroxy-l-propynyl) compound can now be converted to the corresponding l0,l l-unsaturated reactive ester of formula lVa, for example, by reaction with the corresponding alkyl-substituted or arylsubstituted sulfonic acid halide, for example, the chloride, or with thionyl chloride or thionyl bromide. Another method for the preparation of the l0,l l-unsaturated starting materials of formula [Va is described in Example 5 hereinafter.

The l0,l lsaturated compound of formula IV can be prepared by reacting the corresponding tricyclic l0- halo compound, for example, the chloro compound, which are known compounds or can be prepared according to known procedures, with one of the abovementioned metallo organic compounds of 2-propynyl- Z-tetrahydropyranyl ether. The resulting l0,l lsaturated, tricyclic 10-[ 3-( Z-tetrahydro-pyranyloxy)- l propynyl] compound can subsequently, as described above, be hydrolyzed and the corresponding l0,llsaturated reactive ester of formula IV prepared.

The reaction in accordance with the invention of a compound of formula IV or [Va and a compound of formula "I can be carried out in an inert organic solvent such as benzene, toluene, dimethylformamide, or the like. Preferably, the reaction is carried out in the presence of an excess of the compound of formula III, whereby it also serves as an acid-binding agent. As other acid-binding agents in this reaction, there can be utilized, for example, anhydrous potassium carbonate. When employing a readily volatile compound of formula III, the reaction is suitably carried out in a sealed vessel at elevated temperatures, for example, at a temperature in the range of from about to about I". The reaction temperature is not critical. Expediently, it is in the range of from about -20C. to about the boiling point of the reaction mixture; preferably, between room temperature and the boiling point of the reaction mixture.

The tricyclic IO-carbinols of formula V can be prepared, for example, by the reaction of the corresponding tricyclic lOketones, which are known compounds or can be prepared according to known procedures, with a metallo organic compound of the correspondingly substituted 2-propynylamine which may be N- substituted. For example, there can be reacted the correspondng lithium or magnesium halide compound; the metal radical is in the 3-position of the 2-propynylamine. Lithium compounds are preferably reacted in liquid ammonia and an organic solvent such as tetrahydrofuran', magnesium halogen compounds are reacted in an organic solvent such as tetrahydrofuran, at the boiling point of the reaction mixture. The resulting addition compound is subsequently subjected to hydrolysis, for example, by treatment with aqueous ammonium chloride at room temperature, whereby the corresponding tricyclic carbinol of formula V is obtained.

The l l-carbinols of formula V can be prepared, for example, by the reaction of a tricyclic l0,l l-epoxide, which are known compounds or can be prepared according to known procedures, with the abovedescribed metallic organic compound of the correspondingly substituted 2-propynylamine. The lithium compound is preferably reacted in liquid ammonia and an organic solvent such as tetrahydrofuran; the magnesium halide is preferably reacted in an organic solvent such as tetrahydrofuran at the boiling point of the reaction mixture. This method is particularly well suited for the prerparation of symmetrically substituted starting materials of formula V, for example, the 2,8dichloro or the 2,8-dimetyl compounds. The utilization of unsymmetrically substituted l0,l l-epoxides results in a mixture of steroisomers, for example, in a mixture of 2-substituted and 8-substituted compounds which can he separated according to known methods, for example, by column chromatography.

The dehydration of the starting materials of formula V in accordance with embodiment (c) of the invention leads to the l0,l l-unsaturated compounds of formula la. The dehydration can be carried out suitably by utilizing a strong acid, for example, an organic sulfonic acid, such as p-toluenesulfonic acid, methanesulfonic acid or a mineral acid such hydrochloric or hydrobromic acid, in an agueous or non-aqueous medium. Preferably, the dehydration is carried out in an organic sulfonic acid, for example, p-toluenesulfonic acid, in the presence of an inert organic solvent, suc methylene chloride, carbon tetrachloride, acetonitrile, benzene or o-, mor p-xylene. When utilizing a mineral acid, this is carried out, for example, in solution in a lower alkanol. The dehydration can also be carried out by heating in a high-boiling non-aqueous solvent such as dimethylsulfoxide. Other known dehydrating agents can likewise be utilized, for example, acetic anhydride. The temperature for the dehydration preferably is in the range of from about 50 to about 200.

For the alkylation of the compounds of formula VI or formula Vla in accordance with embodiment (d) of the process of the invention, several methods are available.

In case a tertiary amine of formula I or la is desired, it can be prepared, for example, as follows:

A starting material of formula VI or Vla, respectively is reacted with a compound of the formula I where in R is lower alkyl and Y is a leaving group, for example, halogen such as chlorine, bormine or iodine or lower alkanesulfonyloxy benzenesulfonyloxy or lower alkylbenzenesulfonyloxy. As the alkylating agent, there can also be used ethylene oxide, which may be substituted by lower alkyl and in this manner, there is introduced a hydroxyethyl which may be substituted by lower alkyl. The reaction preferably is carried out in an inert solvent, for example, a lower alkanol such as ethanol, or dimethylformamide, at a temperature in the range of from about to about 75.

In another process for the preparation of the tertiary amines of formula I or la, a starting material of formula VI or Vla, respectively, is reacted with a mixture of formaldehyde and formic acid, preferably in an excess at an elevated temperature, for example, at a temperature in the range of from about 50 to about the boiling point of the reaction mixture. Instead of formic acid, sodium borohydride can be utilized in this reaction.

The starting materials of formulas VI and Vla, wherein R'. is hydrogen, that is, primary amines of formula VI or Vla, can be converted into secondary amines of formula I or Ia by reacting a primary amine of formula VI or Vla, respectively, with a haloformic acid ester, for example, chloroformic or bromoformic acid ethyl ester, to form a carbamate; the carbamate is subsequently reduced with a complex metal hydride, for example, lithium aluminum hydride. Both reaction steps are preferably carried out in an inert solvent, for example, in ether or tetrahydrofuran, at a temperature in the range of from about room temperature to the reflux temperature of the reaction mixture, especially at the reflux temperature.

In another process for preparing the secondary 10 amines of formula I or la, a primary amine of formula VI or Vla, respectively, is reacted with chloral, preferable in an inert solvent such as chloroform or benzene, at an elevated temperature, for example, at a tempera ture in the range of between about 50 and the boiling point of the reaction mixture. The resulting formylamino compound is subsequently reduced with a complex metal hydride, for example, lithium aluminum hydride, in anhydrous ether to a secondary amine cor responding to formula l or la.

In another method for preparing the secondary amines of formula I or la, a primary amine of formula VI or Vla, respectively, is reacted with formaldehyde, preferably in an inert solvent, for example, benzene or toluene, at a temperature in the range of from about room temperature and the boiling point of the reaction mixture. The resulting Schiffs base is subsequently converted to a secondary amine of formula I or Ia by reduction. The reduction is suitably carried out by treatment of the Schiffs base with a complex metal hydride such as sodium borohydride or lithium aluminum hydride in anhydrous ether or dioxane.

The oxidation, according to embodiment e) of the process aspects of the invention, of a compound of formula VII or Vlla results in the corresponding N- oxide. As the oxidizing agent, preferably hydrogen peroxide or an organic peracid, for example, mchloroperbenzoic acid, is used. Advantageously, the oxidation is carried out in an inert organic solvent, for example, in a lower alkanol such as methanol or ethanol, ether, benzene, chloroform or methylene chloride, at a temperature in the range of from about 50C. to about room temperature, preferably at a temperature between about 0C. and room temperature. After re moval of the excess oxidizing agent and work-up according to known procedures, there is obtained the corresponding N-oxide. The latter can then be converted, conveniently, into a pharmaceutically acceptable acid addition salt.

The alkanoylation of a compound of formula VIII or VlIIa in accordance with embodiment f) of the process aspects of the invention can be carried out conviently by heating at a temperature in the range of from about 50 to about with a reactive derivative of the corresponding alkanecarboxylic acid, for example, the corresponding acid chloride or acid anhydride. The esterification can also be carried out by reaction with an alkanecarboxylic acid in the presence of a strong acid catalyst, for example, sulfuric acid or p-toluenesulfonic acid, or in the presence of a dehydrating agent, for example, dicyclohexylcarbodiimide or carbonyldiimidazole. The esterification is preferably carried out in an orgainic solvent, for example, benzene, toluene or pyridine.

If it is desired to prepare a compound of formula I or Ia, wherein R and, if desired, R and/or R is hydroxy, or a corresponding N-oxide, there is preferably used a starting material of formula II, lIa, V, Va, VI, Vla, VII, Vlla, VIII or VIIIa, respectively, in which the hydroxy group is protected, for example, by a lower alkyl, benzyl or trimethylsilyl group. After completion of any desired reaction, the protecting group is cleaved. An alkyl group is preferably cleaved by treatment with a pyridine salt, for example, pyridine hydrochloride, if necessary in the presence of water, or by treatment with a boron trihalide, for example, boron tribromide or boron trichloride; a benzyl group is preferably 11 cleaved in a manner similar to that described for the cleavage of a lower alkyl group or by treatment with an alkali metal, such as sodium, in a lower alkanol, such as butanol; and a trimethylsilyl group is preferably extent. To prove the lack of cataleptic activity, representative samples of the end products of the invention were administered intraperitoneally to rats. The following compounds were tested:

cleaved by acid-catalyzed hydrolysis, for example, by Product A; N,N-dimethyl-3-[8-(methylthio)-dibentreatment with aqueous-alcoholic mineral acid such as zo[b,f]thiepin-l0-yl]-2-propynylamine maleate; aqueous ethanolic hydorchloric acid. The cleavage is Product B; N,N-dimethyl-3-(8-chloro-dibenzo[b,f]- preferably carried out in an inert organic solvent, for thiepin-l0-yl)-2-propynylamine maleate; example, benzene, toluene, xylene, or a halogenated P d (1; N N-di h l 3 (ghl -3- h hydrocarbon, such as methylene chloride, chloroform dib w fhhi i t() l)-z l i or carbon tetrachloride, at a temperature in the range m rh lf of from about room temperature to about the boiling Th foregoing compounds were compared {0 hk P of mlxwrev p when boron "lhahde promazine, a well-known central depressant, especially is hhhzed the Cleavage reaeheh the temperature well-known asaneuroleptic agent. The test animals are conveniently is in the range of from about t0 considered to be cataleptic when the homolateral exabout mom p tremities remain in the crossed position for at least 10 The Obtained bases of formulas I and la form Salts seconds. The number of cataleptic animals is recorded i lhergahle W 35 Organic acids: fehexampler every 30 minutes over a 6-hour period. The ED is the with hydrohehe aelds Such as hydrochloric aeld hydro dose at which 50 percent of the animals are cataleptic. bromic acid or hydroiodic acid, with other mineral acids such as sulfuric acid, phosphoric acid or nitric acid; also with organic acids such as tartaric and acetic RESULTS, acid, citric acid, camphorsulfonic acid, methanesulr s' mg/kg fonic acid, to luenesulfonic acid, ascorbic acid, maleic NNdimmhYLLWmmhyhhim dihenm{h acid, mandelic acid and the like. Preferred salts are thicpimIOWILLPmPyHyMmme maeute those formed with hydrohalic acid. Especially pred l00 ferred are those formed with hydrochloric acid and maleic acid. The pharmaceutically acceptable acid (Product B) m0 addition salts, preferably, can be prepared in an inert fir m g f 'fe w fl solvent, for example, ethanol, acetone, acetonitrile, by iigfllg ;,l15i J me me 100 treating the free base with the corresponding anhy- Ch p azin 6 drous acid.

The bases of formulas I and la are partly crystalline, solid substances which are relatively soluble in dimeth- The table m nstrates that no or, respectively, very ylsulfoxide, dimethylformamide, or in chlorinated hyweak cataleptic effect is produced by Substances A, B drocarbons such as chloroform, methylene chloride, or and C in comparison to chlorpromazine, which does in an alkanol such as methanol or ethanol, and are demonstrate cataleptic effects. relatively insoluble in water. To demonstrate the neuroleptic effect of the prod- The pharmaceutically acceptable acid addition salts 4O nets of the invention, representative compounds are of the bases of formulas l and la are crystalline, solid utilized in the following tests: substances. They are freely soluble in dimethylsulfoxide and dimethylformamide, in an alkanol such as l, D t rmination of Homovanillini Acid methanol ethanol and also m chloroform mfithy' Two hours prior to being killed, rats are injected with lene chloride and water. The pharmaceutically acceptthe est Substance able addition Salts of the bases of formulas I and {a are Thereafter, the homovanillinic acid is extracted from relatively insoluble in benzene, ether and petroleum the Supernatant portion of a homogenized mixture of ether brains of the tested rats into butylacetate and later into The compounds of formulas l and are useful as an aqueous solution and is oxidized with potassium neuroleptic agnets, substantially devoid of cataleptic ferric cyanide m a fluorescent dimer From an aehvhy or effeetcreased concentration of homovanillinic acid, (HVA), A eatalephe effeet g y main it can be demonstrated that the test substance works m ning f r an abnormally l flg Period a forced p the same as chlorpromazine, that is, it increases the body position) is considered to be a disturbing side t no of do amine in the ba al angiions. The effect with neuroleptically active compounds and indihomovanillinic titer in untreated rats is arbitrarily set at cates motor disturbances. The products according to percent. the invention have the advantage that they do not have A comparison between Substance A, B and C and this disturbing side effect or have it only to a very slight chlorpromazine gave the following results:

RESULTS Dose Increase of Test Substance mg/kg. po HVA,

(Product B) N,N-dimethy|-3 8-chloro-3-methoxypropynylamine methanesulfonate (Product C) 30 320 Chlorpromazine 20 32l In this test, Substance A, B and C demonstrate as strong an activity as chlorproinazine.

The compounds of the invention, i.e., the compounds of formulas l and 1a, can be used in the form of pharmaceutical preparations, which contain them or their salts, in admixture with organic or inorganic pharmaceutically inert carriers suitable for enteral or parenteral application such as, for example, water, gelatin, milk sugar, starch, magnesium stearate, talc, vegetable oils, gum arabic, polyalkyleneglycols and the like. The pharmaceutical preparations can be in solid form, for example. tablets, dragees, suppositories, capsules or in liquid form, for example, as solutions, suspensions, or emulsions. The preparations may be sterlized and/or contain additives such as preservatives, stabilizers, wetting or emulsifying agents, or salts for varying the osmotic pressure. The pharmaceutical preparations can also contain additional therapeutically active substances.

Preferably, the pharamaceutical dosage forms contain from about 1 to about 200 mg. of a compound of formula 1 or 1a or an equivalent amount of its salts. Preferably, the oral dosage range is between about 0.1 mg/kg/day to about 7.5 mg/kg/day. A preferable dosage range for parenteral preparations is in the range of from about 0.01 mg/kg/day to about 0.75 mg/kg/day. It is understood, however, that the above-mentioned ranges can be varied according to the individual needs and the prescription of the practitioner.

As is evident, the compounds offormulas l and la and their pharmaceutically acceptable acid addition salts have effects qualitatively similar to those of chlorpomazine, known for its therapeutic uses and properties. Thus, the compounds of the invention demonstrate a pattern of activity associated with neuroleptic agents of known efficacy and safety.

The following examples further illustrate the invention. All temperatures are in degrees Centigrade, unless otherwise mentioned.

EXAMPLE 1 Preparation of N,N-dimethyl-3-(8-chloro-dibenzo[b,f]thiepin-10-yl Z-propynylamine 63 G. of p-toluenesulfonic acid and 1,800 ml. of o-xylene are heated to boiling and the water present is distilled. The solution is reacted with 90 g. of l-[3- (dimethylamino l -pr0pynyl]-8-chlorol 0,1 l-dihydrodibenzo[b,f]-thiepin--ol. The reaction mixture is maintained at the boiling temperature for 45 minutes, whereby the remaining water is distilled. The mixture is cooled and poured into 90 ml. of 2N aqueous sodium hydroxide. The aqueous phase is extracted with ether. The resulting organic phase is washed three times with water and subsequently extracted three times with aqueous methanesulfonic acid. The aqueous phase is washed with water and made alkaline with concentrated sodium hydroxide. The reaction mixture is then extracted with ether, and the ether extract washed with water, dried and evaporated, whereby there is obtained N,N-dimethyl-3-(8-chloro-dibenzo[b,f]thiepin-10-y1)- 2-propynylamine, which after recrystallization from hexane, has a melting point of l 18-l20. The maleate is precipitated from ethanol and melts at 178-180.

The starting material l0-[3-(dimethylamino)-1- propynyl ]-8-chloro- I 0,1 l-dihydro-dibenzo[b,f]thiepin-lO-ol can be prepared as follows:

2100 M1. of liquid ammonia is reacted with some crystalline ferric nitrate and subsequently with 10.4 g. of lithium metal over a 2-hour period. After stirring for 30 minutes, there are added 369 ml. of dimethylamino- 1-propyne over a 40-minute period, and the reaction mixture is stirred for an additional 45 minutes. Over a -minute period, there is added dropwise a solution of 300 g. of 8-chloro-10,l l-dihydro-5H-dibenzo[b,f]- thiepin-lO-one in 1500 ml. of tetrahydrofuran. The reaction mixture is allowed to stand overnight. The following morning, the reaction mixture is treated with 228 g. of ammonium chloride in 600 ml. of water. The ammonia, thereafter, is evaporated. 900 Ml. of tetrahydrofuran are added, and the mixture is heated at reflux for 2 hours. The reaction mixture is evaporated, diluted with water and extracted with ether. The ether extract is washed with water and extracted three times with aqueous methanesulfonic acid. The unreacted starting ketones can be recovered from the ethereal phase. The aqueous phase is made alkaline with concentrated sodium hydroxide, whereby there is obtained l0-[3- (dimethy1amino)-l -propynyl]-8-chloro-10, l l-dihydrodibenzo[b,f]thiepin-lO-ol, which is taken up in chloroform. The chloroform phase is washed with water, dried and evaporated, whereby there is obtained the above-named product, which after recrystallization from acetone, has a melting point of 1501 52 EXAMPLE 2 In a similar manner to that described in Example 1, from 10-[3-(dimethylamino)-l-propynyl]-l0,1l-dihydro-S-(rnethylthio)-dibenzo[b,f]thiepin-10-ol, there is obtained N,N-dimethyl-3-[8-(methylthio)-dibenzo[b,f]thiepin-l0-yll-propynylamine. The maleate of the product has a melting point of -146".

The starting material can be prepared in an analogous manner to that described in Example 2, from 10-1 1-dihydro-8-(methylthio)-5H-dibenzo[b,f]-thiepin-lO-one and after recrystallization from benzene/- hexane, has a melting point of l42144.

EXAMPLE 3 In a similar manner to that described in Example I, from 10-[3-(dimethylamino)-1-propynyl]-10,1 l-dihydro-8-methyl-dibenzo[b,f]thiepin-l0-o1, there is obtained N,N-dimethyl-3-(8-methyl-dibenzo[b,f]thiepin- 10-y1)-2-propynylamine. The latter compound can be purified by chromatography on silica gel with chloroform as the eluant solution. The corresponding maleate melts at 12l-l23.

The starting material can be prepared in an analogous manner to that described in Example 1, from 10-11-dihydro-8-methyl-5H-dibenzo[b,f]thiepin- 10-one and melts after recrystallization from ether, at l45-147.5.

EXAMPLE 4 Preparation of N,N-dimethyl-3-[8-ch1oro-dibenzo[b,f]-thiepin-10-yll- Z-propynylamine A solution of 5.1 g. of 10-ethynyl-S-chloro-dibenzo[b,f]-thiepin in 40 m1. of absolute dioxane is treated with 630 mg. of paraformaldehyde, 4.5 ml. of a 6-M solution of dimethylamine in dioxane and 200 mg. of copper (ll) acetate. The mixture is heated at 100C. in a well-sealed flask for 2 hours. After cooling, the mixture is poured onto ice and then acidified with 3-N methanesulfonic acid. The neutral products are rezo[b,l"]thiepin-l-yl]-2-propynylamine, which melts at ll8-l20C. after recrystallization from hexane. The maleate melts at l78l80C.

In an analogous manner to that described above, the following compounds are prepared:

N,N-dimethyl-3[8-methylthio-dibenzo[b,f]thiepin-l0- yll-Z-propynylamine; melting point 7880C. The hydrochloride salt melts at 182l84C-,

N,N-dimethyl-3-[8-methyl-dibenz0[b,f]thiepin-l0-yl]- 2-propynylamine; melting point 7072C. The hydrochloride salt melts at 2l42l6C;

N,N-dimethyl-3-[8-fluoro-dibenzo[b,f]thiepin-l0yl]- 2-propynylamine; melting point 59-6lC. The hydrochloride salt melts at 234236C;

N,N-diethyl-3-[8-chloro-dibenzo[b,f]thiepin-10-yl]-2- propynylamine. The maleate salt melts at l46l48C;

N,N-dimethyl-S-[8-chloro-2-methyl-dibenzo[b,f]thiepinl O-yl ]-2-propynylamine; melting point 9697C. The hydrochloride salt melts at l74-l76C;

l-[3 (8-chloro-dibenzo[b,f]thiepin-l0-yll-2- propynyl]-piperidine; melting point 59-6lC. The methanesulfonate salt melts at l79l8lC;

4-[3-(8-chloro-dibenzo[b,t"]thiepin-10-yl)-2- propynyl]-morpholine, melting point 109C. The methanesulfonate salt melts at l64l66C;

l-[3-(S-chloro-dibenzo[b,f]thiepin-l0-yl)-2 propynyll-pyrrolidine; melting point 7677C. The methanesulfonate salt melts at l52l54C;

N,Ndimethyl-3-{8-fluoro-2-methyldibenzo[b,f]thiepin-lO-yll-Z-propynylamine; melting point 7476C. The hydrochloride salt melts at 23 l234C;

N,N-dimethyl-Ii-l8-chloro-3-methoxy-dibenzo[b,f]-

thiepin-lO-yl]-2 propynylamine; melting point lO2-l04C. The methanesulfonate salt melts at 2] l-2l4C;

N,N-dimethyl-3-[8-methoxy-dibenzo[b,f]thiepin-l0- yll-2-propynylamine; melting point 687lC. The methanesulfonate salt melts at l32l 35C;

N,N-dimethyl-3-[8'chloro-dibenzo[b,f]oxepin-lO-yl]- 2-propynylamine; melting point 62-64C. The methanesulfonate salt melts at l27-l 29C;

N ,N-dimethyl-3-[8-isopropyl-dibenzolb,f]thiepinl 0- yl]-2-propynylamine; boiling point l70C/0.02 mm Hg. The hydrochloride salt melts at l94-l97C;

N,N-dimethyl-3-[2,8-dichloro-dibenzo[b,f]thiepin-l 0- yl]-2-propynylamine; melting point 83-85C. The hydrochloride salt melts at 224227C;

2- 3-( 8-chloro-dibenzo[b,f]thiepinl 0-yl)-2- propynyll-methylaminopethanol; melting point 8790C. The maleate salt melts at l49-l5 PC;

2-{ 4-[3-(S-chloro-dibenzo[b,f]thiepin-l0-yl)-2- propynyll-l-piperazinyl}-ethanol; melting point llll 13C. The dihydrochloride salt melts at 253257C;

N,N-dimethyl-Il-[Z-chloro-8-methylthio-dibenzo[b,f]-

thiepin-lO-yll-Z-propynylamine; melting point l00-l03C. The hydrochloride salt melts at 206-208C;

N,N-dimethyl-3-lZ-methyl-S-methylthio-dibenzo[hf]- thiepin-IO-yH-Z-pmpynylamine; melting point 80-82C. The hydrochloride salt melts at l85l87C;

16 N,N-dimethyl-3-[8-nitro-dibenzo[b,f]thiepin-l0-yl]-2- propynylamine; melting point ll3l l5C. The maleate salt melts at l79l82C; N,N-dimethyl-3-[8-chloro-l lmethyl-dibenzo[b,f]thiepin-lO-yl1-2-propynylamine; boiling point 2l0C/0.2 mm Hg. The hydrochloride salt melts at 240243C;

N,N-3-[3-methyl-8-methylthio-dibenzo[b,f]thiepin-l0- yll-Z-propynylamine; melting point 6972C. The maleate salt melts at l6l163C;

N,N-dimethyl-3-[S-amino-dibenzo[b,f]thiepin-l0-yl]- 2-propynylamine',

N,N-dimethyl-3-[8dimethylamino-dibenzo[b,f]thiepin-l0-yll-2-propynylamine;

N,N-dimethyl-3-[8-methylsulfonyl-dibenzo[b,f]thiepin- 1 O-yl l-2-propynylamine; melting point l3ll33C. The hydrochloride salt melts at 247250C;

N,N-dimethyl-3-{S-dimethylsulfamoyl-dibenzo[b,f]-

thiepin-l 0-yl]-2-propynylamine; melting point ll21 l4C. The hydrochloride salt melts at 2l7-220C;

N,N-dimethyl-3-[8-trifluoromethyl-dibenzo[b,f]thiepin-lO-yll-Z-propynylamine; melting point 88-9 1C. The hydrochloride salt melts at l96l98C.

The lO-ethynyl-S-chloro-dibenzo[b,f]thiepin used as the starting material for the preparation of N,N- dimethyl-3-(8-chloro-dibenzo[b,f]thiepin-l0-yl)-2- propynylamine can be prepared as follows:

59 G. of a trimethylethynylsilane/tetrahydrofuran mixture (corresponding to 0.44 mole of trimethylethynylsilane) in 300 ml. of benzene are slowly treated dropwise at 0C. with 235 ml. of n-butyllithium solution in hexane (corresponding to 0.4 mole). After stirring for an additional 0.5 hour at this temperature, a solution of 52.8 g. of 8-chlorol0,l l-dihydro-SH-dibenzo[b,f]thiepin-l0-one in 250 ml. of benzene is slowly added dropwise. The solution is left overnight in a refrigerator. On the following morning, the mixture is poured onto a solution comprising 250 g. of ammonia chloride in L5 liters of water. By extraction with benzene, there is obtained a mixture of unreacted starting ketone [i.e., 8-chloro-l0,1l-dihydro-5H-dibenzo[b,f]- thiepin-lO-one] and 8-chloro-l0,ll-dihydro-lO- (trimethylsilylethynyl)-dibenzo[b,f]thiepin-l0 ol which is subjected directly to a water-cleavage step.

For this purpose, the mixture is taken up in 500 ml. of benzene and, after the addition of 1.2 g. of p-toluenesulfonic acid, boiled for 2 hours at reflux, the resulting water is removed by distillation. By dilution with benzene and washing to neutrality with water, there is obtained a mixture of unreacted starting ketone and [(8-chloro-dibenzo[b,f]thiepin-l0-yl)-ethynyl]-trimethylsilane which is treated to cleave the trimethylsilyl group.

To the latter mixture, which has been dissolved in 660 ml. of acetone/water (l0:l there is added dropwise over a period of 30 minutes a solution of 64 g. of silver nitrate in 150 ml. of water, and the mixture is stirred for an additional 1 hour Then, a solution of g. of potassium cyanide in 500 ml. of water and 500 ml. of benzene is added and the mixture stirred until two clear phases result. By extraction with benzene, there is obtained a mixture of unreacted starting ketone and lO-ethynyl-S-chlorodibenzo[bflthiepin which is separated by chromatography on silica gel. The lO-ethynyl- 8-chloro-dibenzo[b,f]thiepin melts at l-l08C. after recrystallization from ether/n-pentane.

In an analogous manner to that described above, the following starting materials are prepared:

lO-ethynyl-8-methylthio-dibenzo[b,f]thiepin; melting point 99-l0lC; lO-ethynyl-8-methyl-dibenzo[b,f]thiepin;

point 94-96C; l0-ethynyl-8-fluoro-dibenzo[b,f]thiepin; oil (pure according to thin-layer chromatography); l0-ethynyl-8-chloro-2-methyl-dibenzo[b,f]thiepin;

melting point l27-l29C; 10-ethynyl-8-fluoro-2-methyl-dibenzo[b,f]thiepin;

melting point 7476C; l0-ethynyl-8-chloro-3-methoxy-dibenzo[b,f]thiepin;

melting point l03l05C; l0-ethynyl-8-methoxy-dibenzo[b,f]thiepin;

point l3l-l36C; l0-ethynyl-8-chloro-dibenz[b,f]oxepin; melting point 1 l8l C; l0-ethnyl-8-isopropyl-dibenzo[b,f]thiepin; oil (pure according to thinlayer chromatography); l0-ethynyl-2,8-dichloro-dibenzo[b,f]oxepin;

point l34l37C; 10-ethynyl-Z-chloro-8-methylthio-dibenzo[b,f]thiepin;

melting point l0Ol03C; l0-ethynyl-2-methyl-8-methylthio-dibenzo[b,f]thiepin;

melting point l24-l 26C; lO-ethynyl-S-nitro-dibenzo[b,f]thiepin; melting point l75-l 77C; l0ethynyl-8chloro-l 1-methyl-dibenzo[b,f]thiepin; oil

(pure according to thin-layer chromatography); l0-ethynyl-3-methyl-8-methylthio-dibenzo[b,f]thiepin; oil (pure according to thin-layer chromatography); lO-ethynyl-8methylsulfonyl-dibenzo[b,f]thiepin; melting point l40-l43C; lO-ethynyl-8-amino-dibenzo[b,f]thiepin; l0-ethynyl-8-dimethylamino-dibenzo[b,f]thiepin; l0-ethynyl8-dimethylsulfamoyl-dibenzo[b,f]thiepin;

melting point l33-l 35C; and l0-ethynyl-8-trifluoromethyl-dibenzolbflthiepin;

melting point 63-65C.

melting melting melting EXAMPLE 5 mine; melting point of the maleate salt is l70-l72C.

The 3-( 8-chloro-dibenzo[b,f]thiepinl O-yl)-2- propyn-l-ol mesylate used as the starting material for the preparation of N-methyl-3-(8-chloro-dibenzo{b,f]- thiepin-l0-yl)-2-propynylamine can be prepared as follows:

A solution of I35 g. of l0-ethynyl-8-chloro-dibenzo[b,f]thiepin in ml. of absolute tetrahydrofuran is treated dropwise at room temperature with 52 ml. of a l-M solution of ethylmagnesium bromide solution in tetrahydrofuran. After stirring the mixture for an additional hour, 1.85 g. of paraformaldehyde are pyrrolyzed and led through the mixture in gaseous form. The solution, having now warmed to about 50C., is stirred for an additional 30 minutes and then poured onto a saturated, aqueous ammonium chloride solution. By extraction with benzene and subsequent chromatography on silica gel using benzene/methanol (20:1 as the eluant, there is obtained 3-(8-chloro-dibenzo[b,f]thiepin-l0-yl)-2-propyn-l-ol which melts at llll 13C. after recrystallization from ethyl acetate/petroleum ether.

A solution of6 g. of 3-(8-chloro-dibenzo[b,f]thiepinl0-yl)-2-propyn-l-ol in 50 ml. of pyridine is treated dropwise at -l0C. to 0C. with 1.7 ml. of methanesulfonyl chloride in l0 ml. of pyridine and stirred at this temperature for 2 hours. After pouring onto ice, acidification with hydrochloric acid and extraction with ether, there is obtained 3-(8-ch1oro-dibenzo[b,f]thie pin-lO-yU-Lpropyn-l-ol mesylate which melts at l00l02C. after recrystallization from ether.

EXAMPLE 6 Preparation of 2-{[3-( 8-chloro-dibenzo[b,f]thiepinl O-yl )-2- propynyl ]-methylamino}-ethanol A solution of 2 ml. of ethylene oxide in 10 ml. of ethanol is treated with a solution of 0.6 g. of N-methyl- 3-(8-chloro-dibenzo[b,f]thiepin-l0-yl)-2-propynylamine in 5 ml. of ethanol and stirred at room temperature for about 4 hours. The solvent is evaporated and the residue partitioned between water and ether. The ethereal phase is washed with a dilute aqueous ammo nia solution, dried over sodium sulfate and evaporated, whereby there is obtained 2-{[3-(8-chloro-dibenzo[b,f]-thiepin-l O-yl )-2-propynyl]-methylamino ethanol which melts at 86-88C. after recrystallization from ether/n-pentane.

EXAMPLE 7 Preparation of 2-{4-[3-(8-chloro-dibenzo[b,f]thiepin-l0-yl)-2- propynyl1-l-piperazinyl}-ethyl acetate A solution of 5.0 g. of 2-{4-[3-( 8-chloro-dibenzo[b,f]thiepinl O-yl )-2-propynyl]- l -piperazinyl{- ethanol in 50 ml. of acetic anhydride is heated for 15 minutes on a steam-bath. After evaporation of the excess acetic anhydride under greatly reduced pressure, the resulting oil is taken up in ether and washed with saturated sodium bicarbonate solution. By concentration of the ethereal phase, there is obtained 2-{4-[3-(8- chloro-dibenzo[b,f]thiepinl 0-yl)-2-propynyl]- l piperazinyl}-ethyl acetate which melts at 9699C. after recrystallization from ethyl acetate/hexane.

In an analogous manner to that described above, there is obtained 2-{[3-(8-chloro-dibenzo[b,f]thiepinl0-yl)-2-propynyl]-methylamino {-ethyl acetate which melts at 48-5lC. after recrystallization from petroleum ether.

19 EXAMPLE 8 EXAMPLE 9 Tablets of the following composition are parepared:

Per Tablet N N-dimethyl-3l 8-( methylthio)-dibenzo- [b,f|th|epln-l-yl]-2-propynylamine maleate 25.00 g. Lactose l 10.00 g. Maize Starch 61.00 g. Talc 3.40 g. Magnesium Stearate 0.60 g. 200.00 g.

The ingredients are mixed together and tablets of 200 mg. each are pressed. Thereafter, if desired, the tablets can be coated with ethylcellulose and Carbowax.

Per Tablet N,N-dimethyl-3-[B-(methylthioJ-dibenznlb,f]thiepin-l0-yll-2-propynylamine [00.0 g. Lactose 202.0 g. Maize Starch 80.0 g. Hydrolyzed maize starch 20.0 g. Calcium stearate 8.0 g. 4l0.0 g.

The active ingredient, lactose, maize starch and hydrolyzed maize starch are mixed together and granulated with water to a viscous paste. This paste is passed through a sieve and subsequently dried overnight at 45C. Thereafter, the dried granulate is passed through a sieve and mixed with the calcium stearate. The mixture obtained is pressed to tablets weighing 410 mg. and having a diameter of about 10 mm.

EXAMPLE ll Tablets of the following composition are prepared:

Per Tablet N,N'dimethyl3-l8(methylthio)-dibenzolb,f]th|epln-l0-yll-2-propynylamine 25.0 g. Lactose l l4.0 g. Maize starch 50.0 g. Gelatinized maize starch 8.0 g. Calcium stearate 3.0

The active ingredient, lactose, maize starch and gelatinized maize starch are intimately mixed with one another. The mixture is passed through a comminuting 5 machine and subsequently moistened with water to give a thick paste. The mosit mass is passed through a sieve, and the resulting moist granulate is dried at 45C. The dried granulate is mixed thoroughly with the calcium stearate, and thereafter, pressed to tablets weighing 200 mg. and having a diameter of about 8 mm.

EXAMPLE l2 Tablets of the following composition are prepared:

5 Per Tablet N,N-dimethyl-3-[S-(methylthioldibenzolb,f]th|epin l0'yll-2-propynylamine maleate l4.5 g. Lactose 124.5 g. Maize Starch 50.0 g. Gelatinized maize starch 8.0 g. Calcium stearate 3.0

The active ingredient, lactose, maize starch and gelatinized maize starch are intimately mixed with one another. The mixture is passed through a comminuting machine and subsequently moistened with water to give a thick paste. The moist mass is passed through a sieve, and the resulting moist granulate is dried at 45C.

The dried granulate is mixed thoroughly with the cal cium stearate, and thereafter, pressed to tablets weighing 200 mg. and having a diameter of about 8 mm.

EXAMPLE 13 Capsules of the following composition are prepared:

Per Capsule N ,N-dimethyl-3[ 8( methylthio )-dibenzo- [b,flthiepin-l0yl]2-propynylamine maleate 29.0 g. Lactose 156.0 g. Maize Starch 30.0 g. Talc 5.0 g.

The active ingredient, lactose and maize starch are mixed intimately with one another and passed through a comminuting machine. The mixture is now mixed thoroughly with the talc and filled into hard gelatin capsules.

EXAMPLE 14 Capsules of the following composition are prepared:

Per Capsule N,N-dimethyl-3-[8(methylthio)-dibenzo- [b,flthiepin-lO-ylLZ-propynylamine 25.5 g. Lactose l59.5 g. Maize Starch 30.0 g. Talc 5.0 g. 220.0 g.

The active ingredient, lactose and maize starch are mixed intimately with one another and passed through a comminuting machine. The mixture is now mixed thoroughly with the talc and filled into hard gelatin capsules.

2] EXAMPLE 15 A parenteral preparation of the following composition is prepared:

N,N-dimethyl-3-[8-(methylthio)-dibenzo- 22.2 G. of methanesulfonic acid for injection, 102 g. of active ingredient and 400 g. of glucose are successively dissolved in a glass vessel in 8000 ml. of water for injection with stirring at room temperature.

Subsequently, water for injection is added to a total volume of 10,000 ml. The solution is either aseptically filtered, filled into colorless ampules, gassed with nitrogen and sealed, or filled into colorless ampules, gassed with nitrogen, sealed and subsequently sterilized in a current of steam or autoclaved at 120C. for 30 minutes.

Instead of the active ingredients used in Examples 9-15, there can, of course, also be used in the preparations described therein, other dibenzo[b,f]-thiepin derivatives of the present invention, for example:

N,N-dimethyl-3-(8-chloro-3-methoxy-dibenzo[b,f]-

thiepin-l-yl)-2-propynylamine or its methanesulfonate salt;

N,N-dimethyl-3-(8-chloro-dibenzo[b,f]thiepin-l0-yl)- 2-propynylamine or its maleate or methanesulfonate salt.

Exemplary end products encompassed by claim 1 are also, for example, the following:

the compounds corresponding to the end products of Examples 1-8 and to the above compounds which wherein X is oxygen or sulfur; R

and R independently, are hydrogen or lower alk l; R is h dro en; R and R independently, are hydro gen, lowe r alk yl, hy droxy-lower alkyl, alkanoyloxy-lower alkyl, wherein the alkanoyloxy group contains 2 to 18 carbon atoms, or, when taken together, are a saturated 5-or 6-rnernbered heterocyclic ring, selected from the group consisting of pyrrolidino, piperazino, piperidino, morpholino, thiomorpholino, methyl-piperidino, N-lower alkyl-piperazino, N'-hydroxy-lower alkyl-piperazino, and N'-alkanoyloxy-lower alkyl-piperazino, wherein the alkanoyloxy group contains 2 to [8 carbon atoms; R is lower alkyl, lower alkyl-sulfonyl, hydroxy, lower alkoxy, lower alkylthio, di-(lower alkyl) sulfamoyl, halogen, trifluoromethyl, nitro, amino or di-(lower alkyl) amino; and R and R independently, are hydrogen, lower alkyl, lower alkoxy, lower alkyl-sulfonyl, hydroxy, lower alkylthio, di-(lower alkyl)-sulfamoyl, halogen, trifluoromethyl, nitro, amino or di-(lower alkyl)-amino, or its corresponding N-oxide or a pharmaceutically acceptable acid addition salt thereof.

2. In accordance with claim 1, a compound of the formula R 2 3 CECCH N l R8 X ///\7 wherein X is oxygen or sulfur; R and R independently, are hydrogen or lower alkyl; R is hydrogen, R and R independently, are hydrogen, lower alkyl, hydroxy-lower alkyl, alkanoyloxy-lower alkyl, wherein the alkanoyloxy group contains 2 to l8 carbon atoms, or when taken together, are a saturated 5- or 6-membered heterocyclic ring, selected from the group consisting of pyrrolidino, piperazino, piperidino, morpholino, thiomorpholino, methyl-piperidino, N'-lower alkyl-piperazino, N-hydroxy-lower alkyl-piperazino, and N'-alkanoyloxy-lower alkyl-piperazino, wherein the alkanoyloxy group contains 2 to 18 carbon atoms; R is lower alkyl, lower alkyl-sulfonyl, hydroxy, lower alkoxy, lower alkylthio, di-(lower alkyl) sulfamoyl, halogen, trifluoromethyl, nitro, amino or di-(lower alkyl- )amino; and R and R independently, are hydrogen, lower alkyl, lower alkoxy, lower alkylsulfonyl, hydroxy, lower alkylthio, di-(lower alkyl)-sulfamoyl, halogen, trifluoromethyl, nitro, amino or di-(lower alkyl)- amino, or its corresponding N-oxide or a pharmaceutically acceptable acid addition salt thereof.

3. In accordance with claim 1, a compound of the formula wherein X is oxygen or sulfur, R is hydrogen or lower alkyl; R and R independently, are hydrogen, lower alkyl, hydroxy-lower alkyl, alkanoyloxy-lower alkyl, wherein the alkanoyloxy group contains 2 to 18 carbon atoms, or, when taken together, are a saturated 5- or 6-membered heterocyclic ring, selected from the group consisting of pyrrolidino, piperazino, piperidino, morpholino, thiomorpholino, methyl-piperidino, N'-lower alkyl-piperazino, N'-hydroxy-lower alkylpiperazino, and N'-alkan0yloxy-lower alkyl-piperazino, wherein the alkanoyloxy group contains 2 to 18 carbon atoms; R is lower alkyl, lower alkyl-sulfonyl, hydroxy, lower alkoxy, lower alkylthio, di-(lower alkyl)-sulfamoyl, halogen, trifluoromethyl, nitro, amino or di-(lower alkyl)amino; and R and R independently, are hydrogen, lower alkyl, lower alkoxy, lower alkyl-sulfonyl, hydroxy, lower alkylthio, di-(lower alkyl)-sulfamoyl, halogen, trifluoromethyl, nitro, amino or di-(lower alkyl)-amino, or its corresponding N-oxide or a pharmaceutically acceptable acid addition salt thereof.

4. A compound in accordance with claim 2, wherein R, is hydrogen.

5. A compound in accordance with claim 4, wherein X is sulfur.

6. A compound in accordance with claim 5, wherein R and R are lower alkyl.

7. A compound in accordance with claim 6, wherein R and R are methyl.

8. A compound in accordance with claim 6, wherein R is methylthio and R and R are hydrogen.

9. A compound in accordance with claim 6, wherein R is chloro and R and R are hydrogen.

10. A compound in accordance with claim 6, wherein R is chloro, R is hydrogen and R is methoxy.

11. A compound in accordance with claim 3, wherein R, is hydrogen.

12. A compound in accordance wherein X is sulfur.

13. A compound in accordance wherein R and R are lower alkyl.

14. A compound in accordance wherein R and R are methyl.

15. A compound in accordance with claim 13, wherein R is methylthio and R and R are hydrogen.

16. A compound in accordance with claim 13, wherein R is chloro and R and R are hydrogen.

1"]. A compound in accordance with claim 13, wherein R is chloro, R is hydrogen and R is methoxy.

18. A compound in accordance with claim 3, N,N- dimethyl-3-[8-(methylthio)-dibenzo[b,f]thiepin-l0- yll-Z-propynylamine.

19. A compound in accordance with claim 3, N,N- dimethyl-3-[8-chlorodibenzo[b,f]thiepin-l0-yl1-2- propynylamine.

20. A compound in accordance with claim 3, N,N- dimethyl-3-[8-(chloro-3-(methylthio)-dibenzo[b,f]- thiepinl O-yl]-2-propynylamine.

with claim 11,

with claim 12,

with claim 13,

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION PATENT NO. 1 3,928,383

DATED December 23, 1975 r INVENTOMS) Jean-Pierre Kaplan & Emilio Kyburz It is certifred that error appears in the above-Identified patent and that send Letters Patent are hereby corrected as shown below Column 24, claim 20, line 25, "3 [8- (ch1or0-3- (methylthi0)" should be:

3- [8- (chloro)3 (methy1thi0)- Signed and ,ficalcd this eleventh Day of May 1976 [SEAL] Atresr:

RUTH c. MASON c. MARSHALL DANN Arrestr'ng ()jj'r'rer (nmmissirnn-r uflarcms and Trademarks 

1. A COMPOUND OF THE FORMULA
 2. In accordance with claim 1, a compound of the formula
 3. In accordance with claim 1, a compound of the formula
 4. A compound in accordance with claim 2, wherein R1 is hydrogen.
 5. A compound in accordance with claim 4, wherein X is sulfur.
 6. A compound in accordance with claim 5, wherein R4 and R5 are lower alkyl.
 7. A compound in accordance with claim 6, wherein R4 and R5 are methyl.
 8. A compound in accordance with claim 6, wherein R6 is methylthio and R7 and R8 are hydrogen.
 9. A compound in accordance with claim 6, wherein R6 is chloro and R7 and R8 are hydrogen.
 10. A compound in accordance with claim 6, wherein R6 is chloro, R7 is hydrogen and R8 is methoxy.
 11. A compound in accordance with claim 3, wherein R1 is hydrogen.
 12. A compound in accordance with claim 11, wherein X is sulfur.
 13. A compound in accordance with claim 12, wherein R4 and R5 are lower alkyl.
 14. A compound in accordance with claim 13, wherein R4 and R5 are methyl.
 15. A compound in accordance with claim 13, wherein R6 is methylthio and R7 and R8 are hydrogen.
 16. A compound in accordance with claim 13, wherein R6 is chloro and R7 and R8 are hydrogen.
 17. A compound in accordance with claim 13, wherein R6 is chloro, R7 is hydrogen and R8 is methoxy.
 18. A compound in accordance with claim 3, N,N-dimethyl-3-(8-(methylthio)-dibenzo(b,f)thiepin-10-yl)-2-propynylamine.
 19. A compound in accordance with claim 3, N,N-dimethyl-3-(8-chlorodibenzo(b,f)thiepin-10-yl)-2-propynylamine.
 20. A compound in accordance with claim 3, N,N-dimethyl-3-(8-(chloro-3-(methylthio)-dibenzo(b,f)thiepin-10-yl)-2 -propynylamine. 